Overview

Sydney Bristow, an agent who has been tricked to believe she is working for the U.S. government, is actually working for a criminal organization named the Alliance of Twelve. Upon learning this, Sydney becomes a double agent for the real CIA.

Top Billed Cast

Last Season

2005 | 17 Episodes

The final season kicks off with a shocking revelation and never lets you catch your breath as superspy Sydney Bristow faces one mother of a challenge. Old enemies and favorite guests return for the action-packed series finale.